Multi-chip LED Lighting Fixture with Diffuser
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Solution Overview
Problem
Light-emitting diode (LED) lighting fixtures struggle to provide uniform, omni-directional lighting, as they typically emit highly directional light with non-uniform intensity, which is not easily configurable to distribute light evenly across a wide area, unlike incandescent or fluorescent lights.
Innovation Solution
A multi-chip LED lighting fixture with a light diffuser and strategically positioned LEDs to aggregate non-uniform light emissions, ensuring a substantially uniform luminous intensity across the surface, using secondary diffusers and contoured lighting modules to disperse light and eliminate 'hot spots, while simulating the appearance of a single omni-directional light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If standard LED directional lighting is used, then energy efficiency is improved, but the light is not readily configurable to distribute uniform lighting to a wide area
Solution Approach 1:
The patent creates a dynamic lighting system where multiple contoured modules can be arranged and oriented to achieve uniform omnidirectional lighting. The system adapts by combining multiple directional LED sources in specific geometric configurations, transforming the inherently directional LED output into omnidirectional uniform illumination.
Solution Approach 2:
The patent uses composite structural arrangements of multiple LED types, contoured housings, and reflective surfaces to achieve the desired light distribution. By combining different materials and structural elements in specific configurations, the system maintains LED energy efficiency while achieving uniform omnidirectional light distribution.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves a uniform light distribution across a wide area, reducing energy inefficiencies and mimicking the warm, yellowish light of incandescent bulbs, enhancing the acceptance of LED technology in various applications.
Implementation Method 1
a light diffuser having a first surface and a second surface opposing the first surface and a plurality of LEDs operable to emit non-uniform light in a direction toward the first surface of the light diffuser
Implementation Method 2
light-emitting semiconductor devices, such as light-emitting diodes (LEDs), produce visible light by the electroluminescence of a semiconductor material in response to an electrical current
Data Source
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AI summary
Light emitting device multi-chip lighting fixtures are disclosed. According to one aspect, a lighting fixture is provided, the lighting fixture having a plurality of light-emitting devices operable for emitting light onto a light diffuser. Where each of the light-emitting devices produces light having a non-uniform luminous intensity, each of the light-emitting devices is positioned with respect to one another to illuminate the surface of the light diffuser with an aggregate light having a substantially uniform luminous intensity. In this way, the light cast by the lighting fixture appears to have a substantially uniform luminous intensity.